2(d-1)-7=1

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Solution for 2(d-1)-7=1 equation: 



2(d-1)-7=1

We move all terms to the left:

2(d-1)-7-(1)=0

We add all the numbers together, and all the variables

2(d-1)-8=0

We multiply parentheses

2d-2-8=0

We add all the numbers together, and all the variables

2d-10=0

We move all terms containing d to the left, all other terms to the right

2d=10

d=10/2

d=5

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